Pavement Management Systems

Transcription

1 Pavement Management Systems Presented by Bill Weiss, P.E. Applied Pavement Technology, Inc. (APTech) At the 2015 Municipal Streets Seminar Ames, Iowa

2 Why Pavement Management??? Pavements are expensive Budget constraints Accountable for infrastructure assets Move from reactive to proactive management of pavement repairs

3 Some Challenges of Starting a PM System A different way of doing business Staffing issues Start up costs Tried it before never worked out

4 Different Way of Doing Business Pavement Management supports this new way of doing business

5 Different Way of Doing Business Document needs Improve accountability in decisions Assess and manage risk Make better use of technology Change The Way Assets Are Managed Increase service life Improve performance Preserve asset value Reduce annualized costs

6 What Is Pavement Management? a management approach used by personnel to make cost-effective decisions about a road network. AASHTO Pavement Management Guide (2001) A pavement management system is a set of tools or methods that assist decision-makers in finding optimum strategies for providing, evaluating, and maintaining pavements in a serviceable condition over a period of time. AASHTO Guide for Design of Pavement Structures (1993)

7 Pavement Management Concept $X/mile $~4X/mile Pavement Condition 40% of life 70% of life 90% of life $~6-10X/mile $>10X/mile Pavement Age

8 Three Levels of Pavement Management Network Level Collect condition information on the network Analyze condition information Provide information to upper management to assist in making strategic decisions Provide information to other users to support project selection, design, and other types of analyses

9 Three Levels of Pavement Management Strategic (Policy) Level Make policy decisions Set funding allocations Establish preservation strategies Identify corridor projects Project Level Determine final project recommendations Design rehabilitation strategies Conduct special studies

10 Benefits of Pavement Management More efficient use of available resources Ability to justify funding needs More accurate and accessible information on the pavement network Ability to track pavement performance Present consequences of different treatments and timing Improved communication AASHTO Pavement Management Guide (2001)

11 Pavement Management Components Network Inventory Network Definition Condition Assessment Reports Pavement Management System Database Analysis Tools System Customization Models Costs Treatment Rules

12 Network Inventory Type of Data to be Collected Physical characteristics Construction and maintenance history Traffic levels and/or street classification Soils information Minimal Amount of Information Required Surface type Physical dimensions (length, width, area), From/To Last construction date (or best guess)

13 Street Segmentation The general rules for segmentation are Same surface type Similar construction age, condition range Contiguous Similar maintenance and traffic characteristics Think of them as management units Those that are managed together get segmented together

14 Network Definition Local Agencies

15 Condition Assessment All pavement management recommendations are based on the most recent condition assessment. Therefore, the assessment of current condition MUST be objective, repeatable, and reflect current conditions.

16 Types of Pavement Condition Data Collected Surface distress (ex. cracking, surface deformation) Roughness (ride quality) Faulting Rutting Structure (pavement strength and deflection)

17 Pavement Distress Type what kind? Severity how bad? Quantity how much?

18 Methods for Quantifying Pavement Condition Pavement Condition Index (PCI) ASTM D6433 Modified PCI Windshields

19 Customization Activities Performance models Priority ranking Viable treatment options (& conditions to apply) Maintenance (ex. crack sealing, patching, etc.) Major repair (overlay, slab replacements, reconstruction, etc.) Costs Unit costs, annual budgets

20 Why Use Performance Models? Needs assessment $$ Performance models Predict condition Multi-year workplans What-if analysis Predict M&R

21 Example Performance Model Curve flattens (age yrs) Condition Age ( each line represents 3 years)

22 Family Modeling Approach Group pavement sections by characteristics Reduces number of variables and models Assume similar deterioration Reflects average deterioration for family Allows ranges of values to be used for developing families

23 Other Customization Activities Treatment Costs Based on recent bid documents May vary based on certain factors (location, street network, and so on) Budgets Funds available for each analysis year Some agencies have separate budgets for maintenance and rehabilitation activities

24 Methods of Managing Assets Preservation Approach Good Pavement Condition Poor Traditional Worst First Strategy

25 What Is Pavement Preservation? Good Preventive Maintenance Pavement Preservation Pavement Condition Reconstruction Poor Rehabilitation Routine/Corrective Maintenance Time

26 Getting the Most Bang for Your Buck Condition Deterioration & Treatment Triggers / Resets 100 Condition Index Original Pavement $ 1 $ 2 $ 6 $ 15 Seal Coat Thin Overlay Structural Overlay 50 Remaining Service Life (RSL) = 0 Reconstruction Years / AADT (ESALs) From Utah DOT

27 Keys to Success Be proactive Keep roads from dropping into poor condition Incorporate a mix of fixes into your program Good Fair Poor Effectiveness of Pavement Preservation A pavement management system helps identify what treatments are needed and when they are cost-effective

28 Resource Allocation and Utilization Sample network distribution Initial distribution: 25 mi in good, 50 mi in fair, and 25 mi in poor 20 year repair cycle = 5%/year = 5 mi/year 10% deterioration from good & fair each year $500 available ($100/mi to fix poor & $25/mi to fix fair) Scenario 1: Fix roads in poor condition Scenario 2: Fix some roads in poor & some in fair

29 Sample Outputs After 3 Years Now Good Fair Poor Scenario 1 Scenario 2

30 Demonstrating Pavement Preservation Benefits Average Pavement Condition over Time Pavement Condition Rating Year Worst First Pavement Preservation

31 Using Pavement Management To Tell Your Story

32 5 Core Questions 1. What is the current state of our pavements? What do we own? Where is it? What condition is it in? What is the remaining service life and economic value?

33 5 Core Questions 2. What is the required level of service? What do stakeholders expect? How different is this from actual conditions?

34 5 Core Questions 3. What level of deterioration is acceptable? How do these assets deteriorate? What are the likelihood and consequences of deterioration?

35 5 Core Questions 4. What are the feasible strategies to consider? What repair options are most feasible for our agency? How do these strategies impact system performance?

36 5 Core Questions 5. Which long-term funding strategy should be selected? Does the selected strategy align with policy goals?

37 Reporting Network Conditions

38 Determining Impacts of Program Choices 100 Pavement Condition Index (PCI) Alternate Repair Program Recommended Repair Program Program Year

39 Compare Various Budget Scenarios

40 Setting Agency Goals Cumulative Cost ($) $3,500,000 $3,000,000 $2,500,000 $2,000,000 $1,500,000 $1,000,000 $500,000 $ % in Good Expected $ 75% in Good Year

41 Presenting Results to Stakeholders Network Level City Counsel/County Board Senior agency management Public Project Level Design engineers Mid-level management

42 Don t Take My Word For It Due to the state of the economy, the pavement management system has become more important City of Naperville, IL We are now able to reduce political pressure Champaign County, IL Complete the right work at the right time for the right reasons Edgar County, IL We wanted to have more engineering behind decisions. Stark County, IL

43 Take Away Points Start with the basics, then grow it Identify your agency s PM champion Don t rely on a worst first strategy Use a mix of fixes that includes preventive maintenance treatments on roads in good or fair condition Consider the use of pavement management tools to: Help you make the best use of your road $ Help you tell your story

44 Questions? Contact me at (217) or by at: